Portable gas detector-alarm



FIG. 1 and FIG. 2 are a perspective view showing the right and left sides of the article;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof.

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a right side elevational view thereof; and,

FIG. 8 is a left side elevational view thereof. 

The ornamental design for a portable gas detector-alarm, as shown and described. 